400V Went Off Under This Polestar… We Did NOT Expect What Happened Next!

We knew this Polestar 2 wasn’t charging… but we did NOT expect 400 volts to arc in front of us. What started as a “simple no-charge fault” turned into one of the most dangerous and technically challenging EV rescues we’ve ever done. A dead high-voltage battery, failed onboard charger, mysterious error codes, and a Polestar that refused to move or charge. And then — the moment you see in the thumbnail — 400V reminded us WHY EV diagnostics requires extreme caution. This video shows: ✅ How we manually revived a completely discharged high-voltage battery ✅ Why the Polestar refused to charge… even after coming back to life ✅ The hidden failure inside the charging system ✅ The exact moment where 400V made this job VERY real ✅ How we finally brought this premium EV back to the road 📍 Visit Us: OGS Mechanics Units 9–14, Millers Yard Rear of 28 Long Lane London N3 2QG 📺 Watch Our Repairs in Action: 📌 Subscribe on YouTube → Weekly EV/Hybrid breakdowns, fixes & full diagnostics 📲 Follow the Behind-the-Scenes Garage Life: 🎵 TikTok: https://www.tiktok.com/@ogsmechanics 📸 Instagram: https://www.instagram.com/ogs_mechanics 📘 Facebook: https://www.facebook.com/share/15J54KFwjE/?mibextid=wwXIfr ⏱️ TIMESTAMPS 00:00 – The moment everything went wrong 00:23 – Delivering a dead Polestar… on a trailer 01:10 – The struggle to even get it off the truck 02:00 – First scan: 58 error codes 03:20 – Battery at 0%: the mystery begins 05:00 – Attempt #1: Will it charge? 06:12 – Software update… nothing changes 08:05 – The dangerous 400V moment 10:20 – Decision: remove the entire high-voltage battery 12:00 – Manual revival process 14:40 – Reinstallation & the first signs of life 16:30 – Still NO charging… why? 18:45 – The real culprit: onboard charger failure 20:10 – Replacing the charger control unit 22:00 – IT’S ALIVE… and finally charging 23:40 – Full road test & performance evaluation 25:10 – Final verdict on the repair & cost breakdown 26:30 – Polestar transformation and delivery #Polestar2 #EVRepair #HighVoltageBattery #400Volts #OGSMechanics #ElectricCarFix #EVDiagnostics #BatteryRevival #PolestarProblems #EVChargingIssue Music from #InAudio: https://inaudio.org/ Track Name.Sport Rock Energetic by Infraction [No Copyright Music] / Running Faster Music from #InAudio: https://inaudio.org/ Track Name.Sport Trap Rock Workout by Infraction [No Copyright Music] / Are You Ready